
import java.util.Scanner;
public class ArithmeticTest2 {
    public static void main(String[] args) {
            Arithmetic a = new Arithmetic();

            Scanner scan = new Scanner(System.in);
             System.out.println(a.level1());
        System.out.println(a);
             System.out.println(a.level2());
        System.out.println(a);
             System.out.println(a.level3());
             System.out.println(a.level4());

        }
    }

